Operating mechanism for adding-machines.



I F. R. HOYT. OPERATING MECHANISM FOR ADDING MACHINES.

APPLICATION FILED APR. 25, 1910.

1,005,774. I Patented 0t."10,19'11.

2 SHEETSSHEBT 1.

P. R. HOYT. OPERATING MECHANISM FOR ADDING MACHINES.

APPLICATION I I L E D A PB..25, 1910.

1,005,774.. Patented Oct. 10,1911.

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UNITED STATES PATENT OFFICE.-

FRANCIS R. HOY'I, 0F POPLAR BLUFF, MISSOURI, ASSIGNOR TO DALTON ADDING MACHINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

OPERATING MECHANISM FOR ADDING-MACHINES.

Specification of Letters Patent.

Patented Oct. 10, 1911.

Application filed April 25, 1910. Serial No. 557,349.

anisms for adding machines, and an object is to produce improved mechanism whereby an electro-magnet may be caused to actuate adding machines, and other machines which are operated in the same general manner.

Another object is to provide an electromagnet, preferably of the solenoid type, in

connectionwith an adding machine, and

' key-controlled mechanism for completing an electric circuit, whereby said magnet may be caused to actuate the adding machine and cause said machine to perform its functions.

A further object is to produce an improved connection between the electric ac-' tuating device and the actuated mechanism whereby .full strokes of the latter mechanism in both directions will be assured before reverse operation becomes possible. Other objects will appear from the following description,-reference being made to Y the accompanying drawings in which- Figure 1 illustrates my invention applied to a Dalton adding machine. Fig. 2 is a Fig. 3 is an enlarged detail view of the full stroke and switch devices. Fig. d is a perdiagrammatic view of the electro-magnetic mechanism and the circuit therethrough.

spective view of the actuating levers whereby the switchis operated. Fig. 5 is a perspective view of. the full stroke cam-plate which controls the switch operating levers.

ation of the machine.

Fig. 6 is a perspective illustration of the key levers which control the switch levers.

Adding machines of the type shown are controlled by a shaft 1, frequently de- 1 nominated the main shaft, which is rocked in its bearings by a handle 2 to eflect oper- Such a machine is shown in British patent to Hopkins, No. 854:, of 1904. It is well lmown also that such machines employ keys, shown at 3, by which the numbers to be added are introduced into the machine. When any number is to be added it is introduced into the machine through the medium of the keys, and then the shaft 1 is rocked in order to set in motion the mechanism for performing the work of addition, etc. As stated above. this I shaft may be rocked manually by use of the handle 2; or it may be entrained with suitable actuating mechanism to avoid the.

necessity of manual operation.

The subject matter of the present invention comprises such power mechanism and entraining devices whereby it may be caused to control the operation of the shaft 1, and

' of the magnet is tubular and the armature 7 is located within said core.

A link 8 has its lower end pivoted to the armature 7 and'its upper end pivoted to a crank 9 which is secured to the shaft 1. By this connection thereciprocation of the armature 7 will rock the shaft 1 and thereby operate the adding mechanism to perform its usual functions. To effect this operation it is necessary that the magnet be energized intermittently, in order to reciprocate the armature. The mechanism for performing this operation comprises an important part of the present invention and includes de- 'vices arranged to prevent interruption of any stroke of the armature and of the mechanism operated thereby, so that a full stroke will be assured at every operation of the operating mechanism.

' The armature 7 is connected with a plate 10 by a link 11. The plate 10 is pivoted to a support 12 on the bracket 5. Near the front of the adding machine, preferably in'f'ront of the keys 3, is a rock shaft 13 having rearwardly extending arms 14 which are connected by a rod 15. Stems 16 have their lower ends pivoted to the rod 15 and their upper ends protruding through the key-board plate of the adding machine (Fig. 1). 'Forwardly ektending arms 17 on the up er ends of said stems support a bar 18 WhICh lS located in convenient relation to the keys so that it may be operated readily after each item is introduced into the machine, after the manner of the spacebar orkey of a typewriter. An arm 19, which may be a part of one of'the arms 14, is rigid with the rock shaft 13 and has a spring 20 connecting with some part of the 7 member being supported by pins 34 on the adding machine case or frame. Said spring is effective to restore to idle position the switch key 18 and the parts operated thereby after each operation. An arm 21, rigid with the shaft 13, is connected by a link 22 with an arm 23 attached to a rock shaft 24 which is supported by the part 12 and a bracket 25 secured to said part 12. An arm 26 contacts with a pin 27 carried by the lower end of a pendant link 28 and is effective to swing said pin and link rearwardly whenever the key 18 is depressed. The spring 29 connecting the link 28 with the supporting part 12 actuates said link forwardly to its idle position.

A cup 30, partially filled with oil, is supported in proper relation to the mechanism above described (Fig. 1) and contains the contact or switch mechanism which controls the electric circuit whereby the magnet is energized. Two rods 31 depend from the inner side of the cup closure and are encircled by springs 32. A tubular member 33 has afiange on its upper end having holes through which the rods 31 extend, said lower. ends of the rods 31 and being actuated downwardly by the springs 32. A rod 35, inclosed in a cover 36 of insulating material is mounted to reciprocate through the cup .closure, being supported by said cup and the member 33 in each of which is an insulation bushing 37 through which the rod 35 and the encasement therefor reciprocate. A cup-shaped contact member 38 is attached to the lower end of the rod 35 and is movable by said rod into and out of contact with the member 33 to complete and break the electric circuit which energizes the magnet. It will be noted that both of the contact or terminal members 33 and 38 are constantly immersed in the oil contained in the cup. The end of the wire 39 is connected to an ordinary binding post 40 secured to the cup closure, and the other wire 31 is connected to the rod 35 by a suitable binding device 42. Since the rod 35 is insulated from the cup it is necessary to move the rod 35 so as to bring the member 38 into contact with the member 33, thereby would also operate the lever 44 and cause the latter to move the contact nf ember 38 into contact with the member 33 rand complete the circuit. Such action of the levers,

however, is prevented by the pin 27 which normally is engaged with the lower arm of wardly by operation of the key 18 which permits the spring 48 to operate the levers 44 and 46 effectively to close the switch and complete the circuit. When this is done the magnet 4 becomes energized and actuates the adding machine, as previously described. The front end of the lever44 has a pin 49 extending toward the plate 10. On said plate is an arcuate rib or cam 50. The first result of depression of the key 18 is to permit the front ends of the levers 44 and 46 to drop so that the pin 49 is below the lower edge of the cam 50. When the magnet becomes energized it operates the plate 10, moving the cam 50 over the pin 49, thereby holding the contact members 33 and 38 together, and preserving the circuit from becoming broken until the full stroke is completed. At the completion of the stroke the cam 50 leaves the pin 49 and the springs 32 expand and slightly lower the rod 35 which also raises slightly the end of the lever 44 so that the pointed front end of the cam 50 will extend under the pin 49. A similar cam 51 moves under a pin 52 on the upper arm of the lever 46 and moves said lever to normal adjustment. When the key 18 is released the spring 29 acts to draw the pin 27 forwardly and holds the lever 46 in idle position after the cam 51 passes therefrom. As soon as the cam 50 releases the pin 49 the lever 44 is free to oscillate and the heavier rear end of the lever 44, added to the weight of the rod 35 and parts carried thereby, releases the member 38 from the member 33, thereby breaking the circuit. The adding machine shaft 1 and other parts actuated thereby are then returned to their normal position by their usual well known actuating devices (not shown) and the machine is ready for another operation. While the mechanism is returning to idle position the pins 49 and 52 are above the cams 50 and rocks the shaft 24 which releases the pin 27 from the lever 46. The spring 48 then operates the levers 46 and 44 effectively to :move the contact member 38 against the contact member 33 to complete the circuit. Th s causes the magnet to become energized which draws downwardly the armature '7,

gravity restores the lever 44 to idle position and breaks the circuit by moving the member 38 out of contact with the member 33. As soon as the circuit is broken the adding machine restoring springs (not shown) act-to return the shaft 1 and other parts to idleposition, also moving the cams 50 and 51 under the pins 49 and 52, respectively, which prevents operation of said levers until the full return stroke is completed.

I' am aware. that there may be various changes and alterations in theconstruction and arrangement of the parts comprising this invention Without departure from the spirit and scope of the invention. I do not restrict myself to details of construction but lVhat I claim'and desire to secure by Letters Patent isl. The combination with the main shaft in an adding machine, a handle on said shaft whereby said shaft may be manually operated, and an arm on said shaft, of an armature, a link pivoted to said arm and to said armature, electric mechanism for operating said armature, full stroke mechanism, and a link connecting said armature with said full stroke mechanism, substantially as specified.

2. The combination withthe main shaft in an adding machine, of an arm attached to said shaft, a link pivoted to said arm, an

armature pivoted to said link, electric mechanism for moving said armature effectively to rock said shaft, a full stroke device, and a link connecting said armature with said full stroke device, substantially as specified.

3. The combination with the main shaft of the machine, of an arm attached to said shaft, an armature, a magnet for actuating said armature, an electrlcn circuit for ener 'zing said magnet, aswitch in said circuit, a (ey for operating said switch, a device holding said switch closed during movement of said armature in one direction, a link conmeeting said armature with said device, and

another link connecting said armature with said arm, substantially as specified.

4. The combination with the main shaft of an' adding machine, an arm on said shaft, an armature, and electric mechanism for operating said armature, of a switch controlling said electric mechanism, of a lockin device arranged to prevent opening of sai switch during the time said armature isbe ing moved bysaid electric mechanism, a link device, and another link having one on pivoted to said armature and the other end pivoted to said arm, substantlally as specified.

connecting said armature and said locking In witness whereof, I have signedthis specification in the presence of two sub.

FRANCIS R, HOYT; f

scribing witnesses.

Witnesses:

CHARLES PICKLES, SEELY C. Bonn, 

